Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccb1216b297d7f6…

MALICIOUS

PDF

77.5 KB Created: 2021-04-04 17:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57d80ca1a224e0cb0b30d3a480f28c16 SHA-1: a22ec2adaf327c482f79c03d6df7df3e1b9f4d87 SHA-256: 5ccb1216b297d7f6344134ce0ddb76e38b3f2da881856dae50c3d326b6f620a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a technique often used in SEO poisoning or phishing campaigns to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URL `https://vilenefex.ru/aws?utm_term=colleges+offering+interior+design+course+in+kenya` suggests a lure related to educational opportunities, likely to trick users into clicking through to a compromised or malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vilenefex.ru/aws?utm_term=colleges+offering+interior+design+course+in+kenya
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/vilafujal.pdf
    • http://bullbananavannaone.xyz/53770517352sxnwd.pdf
    • https://cdn-cms.f-static.net/uploads/4462368/normal_600d3d8b0947f.pdf
    • https://xabodalemebom.weebly.com/uploads/1/3/1/3/131381489/sufedinixuribu.pdf
    • http://apeech.ru/florida_department_of_highway_safety_and_motor_vehicles_vin_checkgeclq.pdf
    • http://toppiksnack.xyz/lepukatenejulufiximajimuxlxjb.pdf
    • http://salonvarna.com/text_to_text_connections_activitiesu8zp7.pdf
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5fea16cdddfb0.pdf
    • https://static.s123-cdn-static.com/uploads/4367640/normal_5ffb960f70a6b.pdf
    • https://cdn.sqhk.co/kujaruwajovi/dQhbnGc/65984917534.pdf
    • https://cdn.sqhk.co/rosojolude/fulhhgd/call_recorder_app_android.pdf
    • https://cdn.sqhk.co/segexiji/iibgh3L/vevinalafidenewipatuf.pdf
    • http://perfectiona.online/why_is_my_sandisk_memory_card_not_workingnqe55.pdf
    • https://cdn-cms.f-static.net/uploads/4384836/normal_60286634bf701.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_dac8a0cf4c5e4241893a42132bdc5020.pdf?index=true
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_4d4231211d724d5d9f036ad3ace03de4.pdf?index=true
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_ce207338c2b14af99286b484763b6741.pdf?index=true
    • https://s3.amazonaws.com/gotenukevepunin/aquatic_biomes_worksheet_answers.pdf
    • https://s3.amazonaws.com/gavobawum/how_to_get_section_8_in_san_francisco.pdf
    • https://s3.amazonaws.com/tuxexi/78504739134.pdf
    • https://s3.amazonaws.com/jaloto/67059334577.pdf
    • https://s3.amazonaws.com/mijumomub/99029880712.pdf
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_eb4f59a127f74915a2c15cec70ea7845.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa6.bin
9aa8f15adf8183692de516c8858c42cdc90f18203b0510f8206d1fa8d3a3a3af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 5260 bytes
font_01_sfnt_off000101a4.bin
6a4e891981f54743cec9a17d722f8cd84dc056888023c834307993ecd093b237		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A4 11264 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.